Weight-reduced guide bar of solid material

A weight-reduced guide bar for a saw chain of a motor driven chain saw, the guide bar comprising:

• an elongated bar base body of solid material having a length (L) and a first end and a second end;
• a direction reversal section for said saw chain and said direction reversal section being arranged at said first end of said bar base body;
• a mounting section for fixating said guide bar to the chain saw and said mounting section being arranged at said second end;
• said bar base body defining an outer peripheral edge and having first and second flat sides;
• a guide groove formed in said outer peripheral edge of said bar base body and being configured to guide said saw chain;
• a hollow weight recess formed in only one of said flat sides of said bar base body and said hollow weight recess extending along said bar base body between said mounting section and said reversal section;
• said hollow weight recess being configured as a trough-like recess in said one flat side and said hollow weight recess having a bottom and being open only to said one flat side;
• said hollow weight recess having a support peripheral edge extending around said hollow weight recess and said support peripheral edge being formed as a countersink;
• said hollow weight recess extending over more than half of said length (L) of said bar base body;
• said one flat side defining a plane and said countersink being countersunk relative to said plane so as to be at an elevation above said bottom and at a distance below said plane;
• said hollow weight recess having a longitudinal rib arranged therein so as to be disposed within said support peripheral edge and said longitudinal rib being formed integrally with said base body;
• said longitudinal rib extending from said bottom of said hollow weight recess up to said elevation of said countersink;
• said longitudinal rib extending in the longitudinal direction of said bar base body over the entire length of said hollow weight recess so as to partition said hollow weight recess into component hollow weight recesses extending in said longitudinal direction of said elongated bar base body and so as to cause said component hollow weight recesses to lie adjacent to one another transversely to said longitudinal direction;
• a cover plate fixed to said bar base body and closing said hollow weight recess;
• said cover plate having a rim and lying with said rim on said countersink so as to cause said outer side of said cover plate and said one flat side of said bar base body to conjointly define a common plane;
• said longitudinal rib extending from said bottom of said hollow weight recess to said cover plate thereby bridging the elevation therebetween;
• and,
• said longitudinal rib supporting said cover plate with respect to said bottom to ensure support of said cover plate also when force is applied from the outside.

A guide bar for a saw chain of a motor driven chain saw, the guide bar comprising:

• an elongated bar base body of solid material having a first end and a second end;
• a direction reversal section for said saw chain and said direction reversal section being arranged at said first end of said bar base body;
• a mounting section for fixating said guide bar and said mounting section being arranged at said second end;
• said bar base body defining an outer edge and having first and second flat sides;
• a guide groove formed in said outer edge of said bar base body and being configured to guide said saw chain;
• a hollow weight recess formed in said first flat side of said bar base body and said hollow weight recess extending along said bar base body between said mounting section and said reversal section;
• said hollow weight recess having a peripheral edge and being configured as a trough-like recess having a bottom;
• said hollow weight recess being open only to said first flat side;
• a cover plate for closing said hollow weight recess;
• said hollow weight recess having a longitudinal rib arranged therein and said longitudinal rib being formed integrally with said bar base body;
• said longitudinal rib extending in the longitudinal direction of said bar base body over the entire length of said hollow weight recess so as to partition said hollow weight recess into component hollow weight recesses extending in said longitudinal direction of said elongated bar base body;
• said longitudinal rib extending from said bottom of said hollow weight recess to said cover plate;
• said longitudinal rib supporting said cover plate also when force is applied from the outside;
• said cover plate having an edge;
• said edge of said cover plate and said peripheral edge of said hollow weight recess conjointly defining a peripheral gap;
• a bifocal laser welding seam filling said peripheral gap;
• and,
• said edge of said cover plate and said peripheral edge of said hollow weight recess being liquified to form a liquified material filling said gap to define said welding seam and so as to cause said cover plate to be fixed to said bar base body and so as to cause said welding seam to bridge said gap.

A guide bar for a saw chain of a motor driven chain saw, the guide bar comprising:

• an elongated bar base body of solid material having a first end and a second end;
• a direction reversal section for said saw chain and said direction reversal section being arranged at said first end of said bar base body;
• a mounting section for fixating said guide bar and said mounting section being arranged at said second end;
• said bar base body defining an edge and having a flat side;
• a guide groove formed in said edge of said bar base body and being configured to guide said saw chain;
• a hollow weight recess formed down to a bottom thereof in said flat side of said bar base body and said hollow weight recess extending essentially along said bar base body between said mounting section and said reversal section;
• a cover plate for closing said hollow weight recess;
• said hollow weight recess having a longitudinal rib arranged therein and said longitudinal rib extending in the longitudinal direction of said bar base body;
• the material of said cover plate having a degree of hardness of 20 to 58 HRC and a carbon content between 0.25% and 1%;
• said material of said cover plate being a hardened and tempered steel;
• and,
• said material of said cover plate having a carbon content at least as high as the carbon content of said bar base body.

A guide bar for a saw chain of a motor driven chain saw, the guide bar comprising:

• an elongated bar base body of solid material having a first end and a second end;
• a direction reversal section for said saw chain and said direction reversal section being arranged at said first end of said bar base body;
• a mounting section for fixating said guide bar and said mounting section being arranged at said second end;
• said bar base body defining an edge and having a flat side;
• a guide groove formed in said edge of said bar base body and being configured to guide said saw chain;
• a hollow weight recess formed down to a bottom thereof in said flat side of said bar base body and extending essentially along said bar base body between said mounting section and said reversal section;
• a cover plate for closing said hollow weight recess;
• said hollow weight recess having a longitudinal rib arranged therein for supporting said cover plate and said longitudinal rib extending in the longitudinal direction of said bar base body;
• said cover plate having an edge;
• said hollow weight recess having a peripheral edge;
• said edge of said cover plate and said peripheral edge of said hollow weight recess conjointly defining a gap;
• and,
• said cover plate being fixed on said bar base body with a welding seam filling said gap and formed by liquefying said edge of said cover plate and said peripheral edge of said hollow weight recess.